Espressif Systems ESP8266 Series Hardware Design Manuallines page 2

This document provides product information of ESP8266EX series, including ESP8266EX
chip, ESP-LAUNCHER development board and ESP8266EX modules.
Release Notes
Date
2015.12
2016.01
2016.06
2016.07
2017.01
2017.04
2017.06
2018.04
2018.12
Documentation Change Notification
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Certification
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certificates.
Version Release Notes
V1.3 Initial release.
V1.4 Update Section 1.5.2, Section 1.5.3 and Section 1.6.
V1.5 Update Section 3.1.
V1.6 Update Section 2.1.
Updated the minimum voltage of ESP8266EX to 2.5V;
V2.0
Updated Table 1-1.
Updated the chip's output impedance from 50Ω to 39+j6 Ω;
Added a note that the size of ESP-LAUNCHER's Flash1 and Flash2 is 32
V2.1
Mbit;
Updated Section 1.4.5.
V2.2 Updated Section 1.4.2.
Updated the name of the document from "ESP8266 System Description"
to "ESP8266 Hardware Design Guidelines";
Updated all the figures in the document;
V2.3
Updated Section 1.4 Schematic Checklist;
Updated Chapter 3 ESP8266EX Module.
Updated description in Section 1.4.2 about reset;
V2.4
Updated formatting.
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